With each push alert it sends, Breaking News’ goal is relevance for its users, something that may not be easily tracked by click-through rates. Co-founder Cory Bergman says as a way to measure relevance, Breaking News looks at how many people sign up for more notifications and visit the app. The number of monthly push notifications sent by Breaking News has doubled in the last year, with more users opting into more alerts and the number of subscribers growing faster than the number of alerts.